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Mathias Reisbeck, Lukas Richter, Michael Johannes Helou, Stephan Arlinghaus, Birgit Anton, Ignas van Dommelen, Mario Nitzsche, Michael Baßler, Barbara Kappes, Oliver Friedrich, Oliver Hayden
Time-of-flight (TOF) magnetic sensing of rolling immunomagnetically-labeled cells offers great potential for single cell function analysis at the bedside in even optically opaque media, such as whole blood. However, due to the spatial resolution of the sensor and the low flow rate regime required to observe the behavior of rolling cells, the concentration range of such a workflow is limited. Potential clinical applications, such as testing of leukocyte function, require a cytometer which can cover a cell concentration range of several orders of magnitude...
March 12, 2018: Biosensors & Bioelectronics
Sang Min Yoon, Baek-Yeol Ryoo, So Jung Lee, Jong Hoon Kim, Ji Hoon Shin, Ji Hyun An, Han Chu Lee, Young-Suk Lim
Importance: Patients with hepatocellular carcinoma showing macroscopic vascular invasion have a poor prognosis. Sorafenib is the sole treatment option for these patients, with unsatisfactory response and survival benefit. Combined treatment with transarterial chemoembolization (TACE) plus external beam radiotherapy (RT) has shown promising results for these patients in observational studies. Objective: To evaluate the efficacy and safety of TACE plus RT compared with sorafenib for patients with hepatocellular carcinoma and macroscopic vascular invasion...
March 15, 2018: JAMA Oncology
Dasa Cizkova, Veronika Cubinkova, Tomas Smolek, Adriana-Natalia Murgoci, Jan Danko, Katarina Vdoviakova, Filip Humenik, Milan Cizek, Jusal Quanico, Isabelle Fournier, Michel Salzet
It was recently shown that the conditioned medium (CM) of mesenchymal stem cells can enhance viability of neural and glial cell populations. In the present study, we have investigated a cell-free approach via CM from rat bone marrow stromal cells (MScCM) applied intrathecally (IT) for spinal cord injury (SCI) recovery in adult rats. Functional in vitro test on dorsal root ganglion (DRG) primary cultures confirmed biological properties of collected MScCM for production of neurosphere-like structures and axon outgrowth...
March 15, 2018: International Journal of Molecular Sciences
Yingying Li, Wenying Zhang, Yu Zuo, Ting Zhu, Yue Pang, Tiesong Li, Qingwei Li
Lamprey was considered to be one of the most basal jawless vertebrate representatives for studying vertebrate evolution, embryo development, and the origin of adaptive immunity. Here we investigated the effect of the gut-derived Aeromonas on the lamprey leukocytes proteome using the label-free liquid chromatography-tandem mass spectrometry for quantitative proteomics analysis. Significant difference was observed in the regulation of 34 out of 755 proteins in Aeromonas-immunized lamprey. 31 proteins were only identified in saline solution-immunized lamprey and 47 proteins were only identified in Aeromonas-immunized lamprey...
March 14, 2018: Current Microbiology
Jaepyeong Cha, Aline Broch, Scott Mudge, Kihoon Kim, Jung-Man Namgoong, Eugene Oh, Peter Kim
Accurate, real-time identification and display of critical anatomic structures, such as the nerve and vasculature structures, are critical for reducing complications and improving surgical outcomes. Human vision is frequently limited in clearly distinguishing and contrasting these structures. We present a novel imaging system, which enables noninvasive visualization of critical anatomic structures during surgical dissection. Peripheral nerves are visualized by a snapshot polarimetry that calculates the anisotropic optical properties...
March 1, 2018: Biomedical Optics Express
Xiaohui Han, Shihan Yan, Ziyi Zang, Dongshan Wei, Hong-Liang Cui, Chunlei Du
Protein analysis is the foundation to understanding the mechanisms of complex biological processes. As one of the most widely used techniques to determine protein species and contents, protein dot blot aids biology research but needs corresponding antibodies for marking. A label-free detection method based on terahertz time-domain spectroscopy (THz-TDS) is proposed and demonstrated to improve this traditional technology. A membrane loaded with protein samples is directly scanned using a transmission THz-TDS system for spectral imaging...
March 1, 2018: Biomedical Optics Express
Jinyong Lin, Lingdong Shao, Sufang Qiu, Xingwu Huang, Mengmeng Liu, Zuci Zheng, Duo Lin, Yongliang Xu, Zhihua Li, Yao Lin, Rong Chen, Shangyuan Feng
A home-made near-infrared laser tweezers Raman spectroscopy (LTRS) system was applied to detect hemoglobin variation in red blood cells (RBCs) from diabetes without exogenous labeling. Results showed significant spectral differences existed between the diabetic and normal RBCs, including the peaks dominated by protein components (e.g. 1003 cm-1 ) and heme groups (e.g. 753 cm-1 ) in RBCs, and accurate classification results for diabetes detection were obtained by linear discriminant analysis with 100% sensitivity (i...
March 1, 2018: Biomedical Optics Express
Fredrik Dahl, Olle Ericsson, Olof Karlberg, Filip Karlsson, Mathias Howell, Fredrik Persson, Fredrik Roos, Johan Stenberg, Tarja Ahola, Ida Alftrén, Björn Andersson, Emelie Barkenäs, Birgit Brandner, Jenny Dahlberg, Sara Elfman, Magnus Eriksson, Per-Ola Forsgren, Niels Francois, Anna Gousseva, Faizan Hakamali, Åsa Janfalk-Carlsson, Henrik Johansson, Johanna Lundgren, Atefeh Mohsenchian, Linus Olausson, Simon Olofsson, Atif Qureshi, Björn Skarpås, Anna Sävneby, Eva Åström, Ove Öhman, Magnus Westgren, Helena Kopp-Kallner, Aino Fianu-Jonasson, Argyro Syngelaki, Kypros Nicolaides
Cell-free DNA analysis is becoming adopted for first line aneuploidy screening, however for most healthcare programs, cost and workflow complexity is limiting adoption of the test. We report a novel cost effective method, the Vanadis NIPT assay, designed for high precision digitally-enabled measurement of chromosomal aneuploidies in maternal plasma. Reducing NIPT assay complexity is achieved by using novel molecular probe technology that specifically label target chromosomes combined with a new readout format using a nanofilter to enrich single molecules for imaging and counting without DNA amplification, microarrays or sequencing...
March 14, 2018: Scientific Reports
James E Cassat, Jessica L Moore, Kevin J Wilson, Zach Stark, Boone M Prentice, Raf Van de Plas, William J Perry, Yaofang Zhang, John Virostko, Daniel C Colvin, Kristie L Rose, Audra M Judd, Michelle L Reyzer, Jeffrey M Spraggins, Caroline M Grunenwald, John C Gore, Richard M Caprioli, Eric P Skaar
Diseases are characterized by distinct changes in tissue molecular distribution. Molecular analysis of intact tissues traditionally requires preexisting knowledge of, and reagents for, the targets of interest. Conversely, label-free discovery of disease-associated tissue analytes requires destructive processing for downstream identification platforms. Tissue-based analyses therefore sacrifice discovery to gain spatial distribution of known targets or sacrifice tissue architecture for discovery of unknown targets...
March 14, 2018: Science Translational Medicine
Julie Lamy, Perrine Nogues, Lucie Combes-Soia, Guillaume Tsikis, Valérie Labas, Pascal Mermillod, Xavier Druart, Marie Saint-Dizier
The interactions between oviductal fluid (OF) proteins and spermatozoa play major roles in sperm selection, storage and capacitation before fertilization. However, only a few sperm-interacting proteins in the OF has been identified and very little is known about the regulation of sperm-oviduct interactions across the estrous cycle. Samples of bovine frozen-thawed sperm from three bulls were incubated with OF at pre-, post-ovulatory stages (Pre/Post-ov) or luteal phase (LP) of the estrous cycle (7 mg/ml proteins, treated groups), or with a protein-free media (control)...
March 14, 2018: Reproduction: the Official Journal of the Society for the Study of Fertility
Xiaohan Chen, Golbarg M Roozbahani, Zijing Ye, Youwen Zhang, Rui Ma, Jialing Xiang, Xiyun Guan
Cancers are caused by mutations to genes that regulate cell normal functions. The capability to rapid and reliable detection of specific target gene variations can facilitate early disease detection and diagnosis, and also enables personalized treatment of cancer. Most of the currently available methods for DNA mutation detection are time-consuming and/or require the use of labels or sophisticated instruments. In this work, we reported a label-free enzymatic reaction-based nanopore sensing strategy to detect DNA mutations, including base substitution, deletion, and insertion...
March 14, 2018: ACS Applied Materials & Interfaces
Sunil S Adav, Jin Wei, Jingru Qian, Nicola Yi'An Gan, Leonard W L Yip, Siu Kwan Sze
PURPOSE: Primary angle-closure glaucoma (PACG) is associated with increased intraocular pressure, optic nerve damage, and progressive vision loss, but the molecular mechanism that underpins retinal ganglion neuropathy in PACG remains poorly understood. To better understand the pathogenesis of human PACG, we performed the first comprehensive proteomic analysis of aqueous humor (AH) samples from PACG patients and matched control donors to study pathogenic alteration in AH composition in disease...
March 13, 2018: International Ophthalmology
Zhiyi Liu, Dimitra Pouli, Carlo A Alonzo, Antonio Varone, Sevasti Karaliota, Kyle P Quinn, Karl Münger, Katia P Karalis, Irene Georgakoudi
Monitoring subcellular functional and structural changes associated with metabolism is essential for understanding healthy tissue development and the progression of numerous diseases, including cancer, diabetes, and cardiovascular and neurodegenerative disorders. Unfortunately, established methods for this purpose either are destructive or require the use of exogenous agents. Recent work has highlighted the potential of endogenous two-photon excited fluorescence (TPEF) as a method to monitor subtle metabolic changes; however, mechanistic understanding of the connections between the detected optical signal and the underlying metabolic pathways has been lacking...
March 2018: Science Advances
Xiao Li, Jingting Guo, Ning Liang, Xinwei Jiang, Yuan Song, Shiyi Ou, Yunfeng Hu, Rui Jiao, Weibin Bai
Gingerols, the pungent ingredients in ginger, are reported to possess a cholesterol-lowering activity. However, the underlying mechanism remains unclear. The present study was to investigate how 6-gingerol (6-GN), the most abundant gingerol in fresh ginger, regulates hepatic cholesterol metabolism. HepG2 cells were incubated with various concentrations of 6-GN ranging from 50 to 200 μM for 24 h. Results showed that both cellular total cholesterol and free cholesterol decreased in a dose-dependent manner. Besides, 6-GN ranging from 100 to 200 μM increased the LDLR protein and uptake of fluorescent-labeled LDL...
2018: Frontiers in Pharmacology
Tom Ottoboni, Mary Rose Keller, Matt Cravets, Neil Clendeninn, Barry Quart
Introduction: Fosaprepitant, an intravenous (IV) aprepitant prodrug for chemotherapy-induced nausea and vomiting prophylaxis, is associated with systemic and infusion-site reactions attributed in part to its surfactant, polysorbate 80. HTX-019 is an IV aprepitant formulation free of polysorbate 80 and other synthetic surfactants. Materials and methods: This open-label, single-dose, randomized, two-way crossover bioequivalence study compared pharmacokinetics and safety of HTX-019 and fosaprepitant...
2018: Drug Design, Development and Therapy
Alexander Hogrebe, Louise von Stechow, Dorte B Bekker-Jensen, Brian T Weinert, Christian D Kelstrup, Jesper V Olsen
Comprehensive mass spectrometry (MS)-based proteomics is now feasible, but reproducible quantification remains challenging, especially for post-translational modifications such as phosphorylation. Here, we compare the most popular quantification techniques for global phosphoproteomics: label-free quantification (LFQ), stable isotope labeling by amino acids in cell culture (SILAC) and MS2 - and MS3 -measured tandem mass tags (TMT). In a mixed species comparison with fixed phosphopeptide ratios, we find LFQ and SILAC to be the most accurate techniques...
March 13, 2018: Nature Communications
Jue Hou, Joshua Williams, Elliot Botvinick, Eric Potma, Bruce J Tromberg
Label-free non-linear optical microscopy (NLOM) based on two-photon excited fluorescence (TPEF) from cofactors Nicotinamide Adenine Dinucleotide (NADH) and Flavin Adenine Dinucleotide (FAD+) is widely used for high-resolution cellular redox imaging. In this work, we combined three, label-free NLOM imaging methods to quantitatively characterize breast cancer cells and their relative invasive potential: 1) TPEF optical redox ratio (ORR = FAD+/NADH + FAD+), 2) coherent Raman scattering (CRS) of cellular lipids, and 3) second harmonic generation (SHG) of extracellular matrix (ECM) collagen...
March 13, 2018: Cancer Research
Kiyoshi Takagi, Yasuhiro Miki, Yoshiaki Onodera, Takanori Ishida, Mika Watanabe, Hironobu Sasano, Takashi Suzuki
Rho GTPase activating protein 15 (ARHGAP15) is a recently identified GTPase activating protein which enhances intrinsic hydrolysis of GTP-bound Ras-related C3 botulinus toxin substrate (Rac1), resulting in inactivation of Rac1. Although a lot of studies have pointed out the pivotal roles of the Rac1 pathway in the progression of breast carcinomas, the clinical significance of ARHGAP15 has remained largely unknown in human breast carcinomas. Therefore, we immunolocalized ARHGAP15 in one hundred breast carcinoma tissues...
March 10, 2018: International Journal of Molecular Sciences
Katyayani Tatiparti, Samaresh Sau, Kaustubh A Gawde, Arun K Iyer
Triple negative breast cancer (TNBC) is a difficult to treat disease due to the absence of the three unique receptors estrogen, progesterone and herceptin-2 (HER-2). To improve the current therapy and overcome the resistance of TNBC, there is unmet need to develop an effective targeted therapy. In this regard, one of the logical and economical approaches is to develop a tumor hypoxia-targeting drug formulation platform for selective delivery of payload to the drug-resistant and invasive cell population of TNBC tumors...
March 13, 2018: International Journal of Molecular Sciences
Ying Zhu, Qing Lei, Dan Li, Yang Zhang, Xiaogang Jiang, Zhanhong Hu, Guoqiang Xu
Protein post-translational modification by ubiquitin-fold modifier 1, UFM1, regulates many biological processes such as response to endoplasmic reticulum stress and regulation of tumor progression. Recent study has indicated that the UFM1-binding and PCI domain-containing protein 1 (UFBP1) is required for the conjugation of UFM1 to a substrate. However, other biological functions of UFBP1 have not been explored. Here, we use immunoprecipitation and label-free quantitative proteomics to identify UFBP1-interacting proteins in a mammalian cell line...
March 13, 2018: Journal of Proteome Research
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